Hydraulic Cavity Functions
The hydraulic cavity has three primary capabilities: troubleshooting the abrasive collection system, manually draining the tank, and filtering input water into the high pressure system.
If you notice the abrasive collection efficiency drops, or has stopped completely, refer to the first section below to bring back the performance. To troubleshoot the drain system, refer to the second section. To clean the low pressure filter canister, refer to the third section.
Abrasive Collection System Troubleshooting
1. The low pressure system schematic can be found here. In normal operation, the valves in the hydraulic cavity should have the following orientation
The valve on the left side feeds water into the low pressure system and should be open during normal machine operation. The two purge valves on the right side should be closed during normal machine operation.
2. If the output hose of the venturi is clogged, there will be low or no flow into the used abrasive buckets. The instructions here explain how to clear the hose and improve the abrasive collection.
The valve on the bottom corresponds to flow into the left side used abrasive bucket. The valve on the top corresponds to flow into the right side used abrasive bucket. Do not open either valve unless “used abrasive collection” is turned on.
No flow into the used abrasive bucket during “used abrasive collection”.
Flow with the used abrasive collection turned on and the purge valve opened.
Abrasive collection restored after the purge valve is closed.
Manual Tank Drain System
The red valve can be used to manually drain the tank.
1. First, untether the hose and point the valve into a bucket. The female thread on outlet of the valve is 1/2 BSPT and a longer hose or pump can be attached to make this process easier.
Point closed valve into a bucket.
Open the valve when you are ready to start draining. It will require multiple buckets before the tank is fully drained, depending on the size of your bucket.
Low Pressure Filter
Input filter cleaning steps can be found here.
Dirty filter
Untether the hose at the bottom of the filter and point it into a bucket.
Turn the valve on the top of the filter in the “flush” direction to clean the filter. Once the filter is clean, turn the valve on the top of the filter in the opposite direction to close it.
Clean filter
If there is a leak in the low pressure filter system, see the following link.